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<H1 ALIGN=CENTER>RFC 4671</TITLE> (RFC4671</TITLE>)
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<h3 align=center>RFC 4671</TITLE> - RADIUS Accounting Server MIB for IPv6</h3>
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<PRE>

Network Working Group                                          D. Nelson
Request for Comments: 4671                            Enterasys Networks
Obsoletes: 2621                                              August 2006
Category: Informational

                 RADIUS Accounting Server MIB for IPv6

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This memo defines a set of extensions that instrument RADIUS
   accounting server functions.  These extensions represent a portion of
   the Management Information Base (MIB) for use with network management
   protocols in the Internet community.  Using these extensions,
   IP-based management stations can manage RADIUS accounting servers.

   This memo obsoletes <A HREF="/rfcs/rfc2621.html">RFC 2621</A> by deprecating the MIB table containing
   IPv4-only address formats and defining a new table to add support for
   version-neutral IP address formats.  The remaining MIB objects from
   <A HREF="/rfcs/rfc2621.html">RFC 2621</A> are carried forward into this document.  This memo also adds
   UNITS and REFERENCE clauses to selected objects.

Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................3
   3. The Internet-Standard Management Framework ......................3
   4. Scope of Changes ................................................3
   5. Structure of the MIB Module .....................................4
   6. Deprecated Objects ..............................................5
   7. Definitions .....................................................5
   8. Security Considerations ........................................20
   9. References .....................................................22
      9.1. Normative References ......................................22
      9.2. Informative References ....................................22
   Appendix A. Acknowledgements ......................................23

1.  Introduction

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   The objects defined within this memo relate to the Remote
   Authentication Dial-In User Service (RADIUS) Accounting Server as
   defined in <A HREF="/rfcs/rfc2866.html">RFC 2866</A> [<A HREF="/rfcs/rfc2866.html">RFC2866</A>].

2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in <A HREF="/rfcs/rfc2119.html">RFC 2119</A> [<A HREF="/rfcs/rfc2119.html">RFC2119</A>].

   This document uses terminology from <A HREF="/rfcs/rfc2865.html">RFC 2865</A> [<A HREF="/rfcs/rfc2865.html">RFC2865</A>] and <A HREF="/rfcs/rfc2866.html">RFC 2866</A>
   [<A HREF="/rfcs/rfc2866.html">RFC2866</A>].

   This document uses the word "malformed" with respect to RADIUS
   packets, particularly in the context of counters of "malformed
   packets".  While <A HREF="/rfcs/rfc2866.html">RFC 2866</A> does not provide an explicit definition of
   "malformed", malformed generally means that the implementation has
   determined the packet does not match the format defined in <A HREF="/rfcs/rfc2866.html">RFC 2866</A>.
   Those implementations are used in deployments today, and thus set the
   de facto definition of "malformed".

3.  The Internet-Standard Management Framework

   For a detailed overview of the documents that describe the current
   Internet-Standard Management Framework, please refer to section 7 of
   <A HREF="/rfcs/rfc3410.html">RFC 3410</A> [<A HREF="/rfcs/rfc3410.html">RFC3410</A>].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  MIB objects are generally
   accessed through the Simple Network Management Protocol (SNMP).
   Objects in the MIB are defined using the mechanisms defined in the
   Structure of Management Information (SMI).  This memo specifies a MIB
   module that is compliant to the SMIv2, which is described in STD 58,
   <A HREF="/rfcs/rfc2578.html">RFC 2578</A> [<A HREF="/rfcs/rfc2578.html">RFC2578</A>], STD 58, <A HREF="/rfcs/rfc2579.html">RFC 2579</A> [<A HREF="/rfcs/rfc2579.html">RFC2579</A>] and STD 58, <A HREF="/rfcs/rfc2580.html">RFC 2580</A>
   [<A HREF="/rfcs/rfc2580.html">RFC2580</A>].

4.  Scope of Changes

   This document obsoletes <A HREF="/rfcs/rfc2621.html">RFC 2621</A> [<A HREF="/rfcs/rfc2621.html">RFC2621</A>], RADIUS Accounting Server
   MIB, by deprecating the radiusAccClientTable table and adding a new
   table, radiusAccClientExtTable, containing
   radiusAccClientInetAddressType and radiusAccClientInetAddress.  The
   purpose of these added MIB objects is to support version-neutral IP
   addressing formats.  The existing table containing

   radiusAccClientAddress is deprecated.  The remaining MIB objects from
   <A HREF="/rfcs/rfc2621.html">RFC 2621</A> are carried forward into this document.  This memo also adds
   UNITS and REFERENCE clauses to selected objects.

   <A HREF="/rfcs/rfc4001.html">RFC 4001</A> [<A HREF="/rfcs/rfc4001.html">RFC4001</A>], which defines the SMI Textual Conventions for
   version-neutral IP addresses, contains the following recommendation.

   'In particular, when revising a MIB module that contains IPv4
   specific tables, it is suggested to define new tables using the
   textual conventions defined in this memo [<A HREF="/rfcs/rfc4001.html">RFC4001</A>] that support all
   versions of IP.  The status of the new tables SHOULD be "current",
   whereas the status of the old IP version specific tables SHOULD be
   changed to "deprecated".  The other approach, of having multiple
   similar tables for different IP versions, is strongly discouraged.'

5.  Structure of the MIB Module

   The RADIUS accounting protocol, described in <A HREF="/rfcs/rfc2866.html">RFC 2866</A> [<A HREF="/rfcs/rfc2866.html">RFC2866</A>],
   distinguishes between the client function and the server function.
   In RADIUS accounting, clients send Accounting-Requests, and servers
   reply with Accounting-Responses.  Typically, Network Access Server
   (NAS) devices implement the client function, and thus would be
   expected to implement the RADIUS accounting client MIB, while RADIUS
   accounting servers implement the server function, and thus would be
   expected to implement the RADIUS accounting server MIB.

   However, it is possible for a RADIUS accounting entity to perform
   both client and server functions.  For example, a RADIUS proxy may
   act as a server to one or more RADIUS accounting clients, while
   simultaneously acting as an accounting client to one or more
   accounting servers.  In such situations, it is expected that RADIUS
   entities combining client and server functionality will support both
   the client and server MIBs.  The server MIB is defined in this
   document, and the client MIB is defined in [<A HREF="/rfcs/rfc4670.html">RFC4670</A>].

   This MIB module contains thirteen scalars as well as a single table,
   the RADIUS Accounting Client Table, which contains one row for each
   RADIUS accounting client with which the server shares a secret.  Each
   entry in the RADIUS Accounting Client Table includes twelve columns
   presenting a view of the activity of the RADIUS accounting server.

   This MIB imports from [<A HREF="/rfcs/rfc2578.html">RFC2578</A>], [<A HREF="/rfcs/rfc2580.html">RFC2580</A>], [<A HREF="/rfcs/rfc3411.html">RFC3411</A>], and [<A HREF="/rfcs/rfc4001.html">RFC4001</A>].

6.  Deprecated Objects

   The deprecated table in this MIB is carried forward from <A HREF="/rfcs/rfc2621.html">RFC 2621</A>
   [<A HREF="/rfcs/rfc2621.html">RFC2621</A>].  There are two conditions under which it MAY be desirable
   for managed entities to continue to support the deprecated table:

   1.  The managed entity only supports IPv4 address formats.

   2.  The managed entity supports both IPv4 and IPv6 address formats,
       and the deprecated table is supported for backwards compatibility
       with older management stations.  This option SHOULD only be used
       when the IP addresses in the new table are in IPv4 format and can
       accurately be represented in both the new table and the
       deprecated table.

   Managed entities SHOULD NOT instantiate row entries in the deprecated
   table, containing IPv4-only address objects, when the RADIUS
   accounting client address represented in such a table row is not an
   IPv4 address.  Managed entities SHOULD NOT return inaccurate values
   of IP address or SNMP object access errors for IPv4-only address
   objects in otherwise populated tables.  When row entries exist in
   both the deprecated IPv4-only table and the new IP-version-neutral
   table that describe the same RADIUS accounting client, the row
   indexes SHOULD be the same for the corresponding rows in each table,
   to facilitate correlation of these related rows by management
   applications.

7.  Definitions

   RADIUS-ACC-SERVER-MIB DEFINITIONS ::= BEGIN

   IMPORTS
          MODULE-IDENTITY, OBJECT-TYPE, OBJECT-IDENTITY,
          Counter32, Integer32,
          IpAddress, TimeTicks, mib-2      FROM SNMPv2-SMI
          SnmpAdminString                  FROM SNMP-FRAMEWORK-MIB
          InetAddressType, InetAddress     FROM INET-ADDRESS-MIB
          MODULE-COMPLIANCE, OBJECT-GROUP  FROM SNMPv2-CONF;

   radiusAccServMIB MODULE-IDENTITY
          LAST-UPDATED "200608210000Z"  -- 21 August 2006
          ORGANIZATION "IETF RADIUS Extensions Working Group."
          CONTACT-INFO
                 " Bernard Aboba
                   Microsoft
                   One Microsoft Way
                   Redmond, WA  98052
                   US

                   Phone: +1 425 936 6605
                   EMail: <A HREF="mailto:bernarda@microsoft.com">bernarda@microsoft.com</A>"
          DESCRIPTION
                "The MIB module for entities implementing the server
                 side of the Remote Authentication Dial-In User
                 Service (RADIUS) accounting protocol.  Copyright (C)
                 The Internet Society (2006).  This version of this
                 MIB module is part of <A HREF="/rfcs/rfc4671.html">RFC 4671</A>; see the RFC itself
                 for full legal notices."
          REVISION "200608210000Z"  -- 21 August 2006
          DESCRIPTION
                "Revised version as published in <A HREF="/rfcs/rfc4671.html">RFC 4671</A>.  This
                 version obsoletes that of <A HREF="/rfcs/rfc2621.html">RFC 2621</A> by deprecating
                 the MIB table containing IPv4-only address formats
                 and defining a new table to add support for version-
                 neutral IP address formats.  The remaining MIB objects
                 from <A HREF="/rfcs/rfc2621.html">RFC 2621</A> are carried forward into this version."
          REVISION "199906110000Z"    -- 11 Jun 1999
          DESCRIPTION "Initial version as published in <A HREF="/rfcs/rfc2621.html">RFC 2621</A>."
          ::= { radiusAccounting 1 }

   radiusMIB  OBJECT-IDENTITY
          STATUS  current
          DESCRIPTION
                "The OID assigned to RADIUS MIB work by the IANA."
          ::= { mib-2 67 }

   radiusAccounting  OBJECT IDENTIFIER ::= {radiusMIB 2}

   radiusAccServMIBObjects  OBJECT IDENTIFIER
         ::= { radiusAccServMIB 1 }

   radiusAccServ  OBJECT IDENTIFIER
         ::= { radiusAccServMIBObjects 1 }

   radiusAccServIdent OBJECT-TYPE
          SYNTAX      SnmpAdminString
          MAX-ACCESS  read-only
          STATUS      current
          DESCRIPTION
                "The implementation identification string for the
                 RADIUS accounting server software in use on the
                 system, for example, 'FNS-2.1'."
          ::= {radiusAccServ 1}

   radiusAccServUpTime OBJECT-TYPE
          SYNTAX      TimeTicks
          MAX-ACCESS  read-only

          STATUS      current
          DESCRIPTION
                "If the server has a persistent state (e.g., a
                 process), this value will be the time elapsed (in
                 hundredths of a second) since the server process was
                 started.  For software without persistent state, this
                 value will be zero."
          ::= {radiusAccServ 2}

   radiusAccServResetTime OBJECT-TYPE
          SYNTAX      TimeTicks
          MAX-ACCESS  read-only
          STATUS      current
          DESCRIPTION
                "If the server has a persistent state (e.g., a process)
                 and supports a 'reset' operation (e.g., can be told to
                 re-read configuration files), this value will be the
                 time elapsed (in hundredths of a second) since the
                 server was 'reset.'  For software that does not
                 have persistence or does not support a 'reset'
                 operation, this value will be zero."
          ::= {radiusAccServ 3}

   radiusAccServConfigReset OBJECT-TYPE
          SYNTAX INTEGER { other(1),
                           reset(2),
                           initializing(3),
                           running(4)}
          MAX-ACCESS  read-write
          STATUS      current
          DESCRIPTION
                 "Status/action object to reinitialize any persistent
                  server state.  When set to reset(2), any persistent
                  server state (such as a process) is reinitialized as
                  if the server had just been started.  This value will
                  never be returned by a read operation.  When read,
                  one of the following values will be returned:
                      other(1) - server in some unknown state;
                      initializing(3) - server (re)initializing;
                      running(4) - server currently running."
          ::= {radiusAccServ 4}

   radiusAccServTotalRequests OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION

                "The number of packets received on the
                 accounting port."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4.1"
          ::= { radiusAccServ 5 }

   radiusAccServTotalInvalidRequests OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of RADIUS Accounting-Request packets
                 received from unknown addresses."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> sections 2, 4.1"
          ::= { radiusAccServ 6 }

   radiusAccServTotalDupRequests OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of duplicate RADIUS Accounting-Request
                 packets received."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4.1"
          ::= { radiusAccServ 7 }

   radiusAccServTotalResponses OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of RADIUS Accounting-Response packets
                 sent."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4.2"
          ::= { radiusAccServ 8 }

   radiusAccServTotalMalformedRequests OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of malformed RADIUS Accounting-Request
                 packets received.  Bad authenticators or unknown
                 types are not included as malformed Access-Requests."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 3"

          ::= { radiusAccServ 9 }

   radiusAccServTotalBadAuthenticators OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS Accounting-Request packets
                that contained an invalid authenticator."
         REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 3"
         ::= { radiusAccServ 10 }

   radiusAccServTotalPacketsDropped OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of incoming packets silently discarded
                for a reason other than malformed, bad authenticators,
                or unknown types."
         REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 3"
         ::= { radiusAccServ 11 }

   radiusAccServTotalNoRecords OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of RADIUS Accounting-Request packets
                 that were received and responded to but not
                 recorded."
          ::= { radiusAccServ 12 }

   radiusAccServTotalUnknownTypes OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
               "The number of RADIUS packets of unknown type that
                were received."
         REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4"
         ::= { radiusAccServ 13 }

   radiusAccClientTable OBJECT-TYPE

          SYNTAX     SEQUENCE OF RadiusAccClientEntry
          MAX-ACCESS not-accessible
          STATUS     deprecated
          DESCRIPTION
                "The (conceptual) table listing the RADIUS accounting
                 clients with which the server shares a secret."
          ::= { radiusAccServ 14 }

   radiusAccClientEntry OBJECT-TYPE
          SYNTAX     RadiusAccClientEntry
          MAX-ACCESS not-accessible
          STATUS     deprecated
          DESCRIPTION
                "An entry (conceptual row) representing a RADIUS
                 accounting client with which the server shares a
                 secret."
          INDEX      { radiusAccClientIndex }
          ::= { radiusAccClientTable 1 }

   RadiusAccClientEntry ::= SEQUENCE {
          radiusAccClientIndex                           Integer32,
          radiusAccClientAddress                         IpAddress,
          radiusAccClientID                        SnmpAdminString,
          radiusAccServPacketsDropped                    Counter32,
          radiusAccServRequests                          Counter32,
          radiusAccServDupRequests                       Counter32,
          radiusAccServResponses                         Counter32,
          radiusAccServBadAuthenticators                 Counter32,
          radiusAccServMalformedRequests                 Counter32,
          radiusAccServNoRecords                         Counter32,
          radiusAccServUnknownTypes                      Counter32
   }

   radiusAccClientIndex OBJECT-TYPE
          SYNTAX     Integer32 (1..2147483647)
          MAX-ACCESS not-accessible
          STATUS     deprecated
          DESCRIPTION
                "A number uniquely identifying each RADIUS accounting
                 client with which this server communicates."
          ::= { radiusAccClientEntry 1 }

   radiusAccClientAddress OBJECT-TYPE
          SYNTAX     IpAddress
          MAX-ACCESS read-only
          STATUS     deprecated
          DESCRIPTION
                "The NAS-IP-Address of the RADIUS accounting client

                 referred to in this table entry."
          ::= { radiusAccClientEntry 2 }

   radiusAccClientID OBJECT-TYPE
          SYNTAX     SnmpAdminString
          MAX-ACCESS read-only
          STATUS     deprecated
          DESCRIPTION
                "The NAS-Identifier of the RADIUS accounting client
                 referred to in this table entry.  This is not
                 necessarily the same as sysName in MIB II."
          REFERENCE "<A HREF="/rfcs/rfc2865.html">RFC 2865</A> section 5.32"
          ::= { radiusAccClientEntry 3 }

   -- Server Counters
   --
   -- Requests - DupRequests - BadAuthenticators - MalformedRequests -
   -- UnknownTypes -  PacketsDropped - Responses = Pending
   --
   -- Requests - DupRequests - BadAuthenticators - MalformedRequests -
   -- UnknownTypes - PacketsDropped - NoRecords = entries logged

   radiusAccServPacketsDropped OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS deprecated
         DESCRIPTION
              "The number of incoming packets received
               from this client and silently discarded
               for a reason other than malformed, bad
               authenticators, or unknown types."
        REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 3"
        ::= { radiusAccClientEntry  4 }

   radiusAccServRequests OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS deprecated
          DESCRIPTION
                "The number of packets received from this
                 client on the accounting port."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4.1"
          ::= { radiusAccClientEntry  5 }

   radiusAccServDupRequests OBJECT-TYPE
          SYNTAX Counter32

          UNITS "packets"
          MAX-ACCESS read-only
          STATUS deprecated
          DESCRIPTION
                "The number of duplicate RADIUS Accounting-Request
                 packets received from this client."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4.1"
          ::= { radiusAccClientEntry 6 }

   radiusAccServResponses OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS deprecated
          DESCRIPTION
                "The number of RADIUS Accounting-Response packets
                 sent to this client."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4.2"
          ::= { radiusAccClientEntry  7 }

   radiusAccServBadAuthenticators OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS deprecated
          DESCRIPTION
                "The number of RADIUS Accounting-Request packets
                 that contained invalid authenticators received
                 from this client."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 3"
          ::= { radiusAccClientEntry  8 }

   radiusAccServMalformedRequests OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS deprecated
          DESCRIPTION
                "The number of malformed RADIUS Accounting-Request
                 packets that were received from this client.
                 Bad authenticators and unknown types
                 are not included as malformed Accounting-Requests."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 3"
          ::= { radiusAccClientEntry  9 }

   radiusAccServNoRecords OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"

          MAX-ACCESS read-only
          STATUS deprecated
          DESCRIPTION
                "The number of RADIUS Accounting-Request packets
                 that were received and responded to but not
                 recorded."
          ::= { radiusAccClientEntry  10 }

   radiusAccServUnknownTypes OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS deprecated
          DESCRIPTION
                "The number of RADIUS packets of unknown type that
                 were received from this client."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4"
          ::= { radiusAccClientEntry  11 }

   -- New MIB objects added in this revision

   radiusAccClientExtTable OBJECT-TYPE
          SYNTAX     SEQUENCE OF RadiusAccClientExtEntry
          MAX-ACCESS not-accessible
          STATUS     current
          DESCRIPTION
                "The (conceptual) table listing the RADIUS accounting
                 clients with which the server shares a secret."
          ::= { radiusAccServ 15 }

   radiusAccClientExtEntry OBJECT-TYPE
          SYNTAX     RadiusAccClientExtEntry
          MAX-ACCESS not-accessible
          STATUS     current
          DESCRIPTION
                "An entry (conceptual row) representing a RADIUS
                 accounting client with which the server shares a
                 secret."
          INDEX      { radiusAccClientExtIndex }
          ::= { radiusAccClientExtTable 1 }

   RadiusAccClientExtEntry ::= SEQUENCE {
          radiusAccClientExtIndex               Integer32,
          radiusAccClientInetAddressType        InetAddressType,
          radiusAccClientInetAddress            InetAddress,
          radiusAccClientExtID                  SnmpAdminString,
          radiusAccServExtPacketsDropped        Counter32,

          radiusAccServExtRequests              Counter32,
          radiusAccServExtDupRequests           Counter32,
          radiusAccServExtResponses             Counter32,
          radiusAccServExtBadAuthenticators     Counter32,
          radiusAccServExtMalformedRequests     Counter32,
          radiusAccServExtNoRecords             Counter32,
          radiusAccServExtUnknownTypes          Counter32,
          radiusAccServerCounterDiscontinuity   TimeTicks
   }

   radiusAccClientExtIndex OBJECT-TYPE
          SYNTAX     Integer32 (1..2147483647)
          MAX-ACCESS not-accessible
          STATUS     current
          DESCRIPTION
                "A number uniquely identifying each RADIUS accounting
                 client with which this server communicates."
          ::= { radiusAccClientExtEntry 1 }

          radiusAccClientInetAddressType OBJECT-TYPE
            SYNTAX     InetAddressType
            MAX-ACCESS read-only
            STATUS     current
            DESCRIPTION
                  "The type of address format used for the
                   radiusAccClientInetAddress object."
            ::= { radiusAccClientExtEntry 2 }

      radiusAccClientInetAddress OBJECT-TYPE
            SYNTAX     InetAddress
            MAX-ACCESS read-only
            STATUS     current
            DESCRIPTION
                  "The IP address of the RADIUS accounting
                   client referred to in this table entry, using
                   the IPv6 address format."
            ::= { radiusAccClientExtEntry 3 }

   radiusAccClientExtID OBJECT-TYPE
          SYNTAX     SnmpAdminString
          MAX-ACCESS read-only
          STATUS     current
          DESCRIPTION
                "The NAS-Identifier of the RADIUS accounting client
                 referred to in this table entry.  This is not
                 necessarily the same as sysName in MIB II."
          REFERENCE "<A HREF="/rfcs/rfc2865.html">RFC 2865</A> section 5.32"
          ::= { radiusAccClientExtEntry 4 }

   -- Server Counters
   --
   -- Requests - DupRequests - BadAuthenticators - MalformedRequests -
   -- UnknownTypes -  PacketsDropped - Responses = Pending
   --
   -- Requests - DupRequests - BadAuthenticators - MalformedRequests -
   -- UnknownTypes - PacketsDropped - NoRecords = entries logged

   radiusAccServExtPacketsDropped OBJECT-TYPE
         SYNTAX Counter32
         UNITS "packets"
         MAX-ACCESS read-only
         STATUS current
         DESCRIPTION
              "The number of incoming packets received from this
               client and silently discarded for a reason other
               than malformed, bad authenticators, or unknown types.
               This counter may experience a discontinuity when the
               RADIUS Accounting Server module within the managed
               entity is reinitialized, as indicated by the current
               value of radiusAccServerCounterDiscontinuity."
        REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 3"
        ::= { radiusAccClientExtEntry  5 }

   radiusAccServExtRequests OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of packets received from this
                 client on the accounting port.  This counter
                 may experience a discontinuity when the
                 RADIUS Accounting Server module within the
                 managed entity is reinitialized, as indicated by
                 the current value of
                 radiusAccServerCounterDiscontinuity."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4.1"
          ::= { radiusAccClientExtEntry  6 }

   radiusAccServExtDupRequests OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of duplicate RADIUS Accounting-Request
                 packets received from this client.  This counter

                 may experience a discontinuity when the RADIUS
                 Accounting Server module within the managed
                 entity is reinitialized, as indicated by the
                 current value of
                 radiusAccServerCounterDiscontinuity."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4.1"
          ::= { radiusAccClientExtEntry 7 }

   radiusAccServExtResponses OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of RADIUS Accounting-Response packets
                 sent to this client.  This counter may experience
                 a discontinuity when the RADIUS Accounting Server
                 module within the managed entity is reinitialized,
                 as indicated by the current value of
                 radiusAccServerCounterDiscontinuity."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4.2"
          ::= { radiusAccClientExtEntry  8 }

   radiusAccServExtBadAuthenticators OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of RADIUS Accounting-Request packets
                 that contained invalid authenticators received
                 from this client.  This counter may experience a
                 discontinuity when the RADIUS Accounting Server
                 module within the managed entity is reinitialized,
                 as indicated by the current value of
                 radiusAccServerCounterDiscontinuity."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 3"
          ::= { radiusAccClientExtEntry  9 }

   radiusAccServExtMalformedRequests OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of malformed RADIUS Accounting-Request
                 packets that were received from this client.
                 Bad authenticators and unknown types are not

                 included as malformed Accounting-Requests.  This
                 counter may experience a discontinuity when the
                 RADIUS Accounting Server module within the managed
                 entity is reinitialized, as indicated by the current
                 value of radiusAccServerCounterDiscontinuity."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 3"
          ::= { radiusAccClientExtEntry  10 }

   radiusAccServExtNoRecords OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of RADIUS Accounting-Request packets
                 that were received and responded to but not
                 recorded.  This counter may experience a
                 discontinuity when the RADIUS Accounting Server
                 module within the managed entity is reinitialized,
                 as indicated by the current value of
                 radiusAccServerCounterDiscontinuity."
          ::= { radiusAccClientExtEntry  11 }

   radiusAccServExtUnknownTypes OBJECT-TYPE
          SYNTAX Counter32
          UNITS "packets"
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                "The number of RADIUS packets of unknown type that
                 were received from this client.  This counter may
                 experience a discontinuity when the RADIUS Accounting
                 Server module within the managed entity is
                 reinitialized, as indicated by the current value of
                 radiusAccServerCounterDiscontinuity."
          REFERENCE "<A HREF="/rfcs/rfc2866.html">RFC 2866</A> section 4"
          ::= { radiusAccClientExtEntry  12 }

   radiusAccServerCounterDiscontinuity OBJECT-TYPE
            SYNTAX TimeTicks
            UNITS "centiseconds"
            MAX-ACCESS read-only
            STATUS current
            DESCRIPTION
                  "The number of centiseconds since the last
                   discontinuity in the RADIUS Accounting Server
                   counters.  A discontinuity may be the result of
                   a reinitialization of the RADIUS Accounting Server

                   module within the managed entity."
            ::= { radiusAccClientExtEntry 13 }

   -- conformance information

   radiusAccServMIBConformance  OBJECT IDENTIFIER
          ::= { radiusAccServMIB 2 }

   radiusAccServMIBCompliances  OBJECT IDENTIFIER
          ::= { radiusAccServMIBConformance 1 }

   radiusAccServMIBGroups  OBJECT IDENTIFIER
          ::= { radiusAccServMIBConformance 2 }

   -- compliance statements

   radiusAccServMIBCompliance MODULE-COMPLIANCE
          STATUS  deprecated
          DESCRIPTION
               "The compliance statement for accounting servers
               implementing the RADIUS Accounting Server MIB.
               Implementation of this module is for IPv4-only
               entities, or for backwards compatibility use with
               entities that support both IPv4 and IPv6."
          MODULE  -- this module
          MANDATORY-GROUPS { radiusAccServMIBGroup }

          OBJECT        radiusAccServConfigReset
          WRITE-SYNTAX  INTEGER { reset(2) }
          DESCRIPTION  "The only SETable value is 'reset' (2)."

          ::= { radiusAccServMIBCompliances 1 }

   radiusAccServExtMIBCompliance MODULE-COMPLIANCE
          STATUS  current
          DESCRIPTION
               "The compliance statement for accounting
               servers implementing the RADIUS Accounting
               Server IPv6 Extensions MIB.  Implementation of
               this module is for entities that support IPv6,
               or support IPv4 and IPv6."
          MODULE  -- this module
          MANDATORY-GROUPS { radiusAccServExtMIBGroup }

          OBJECT        radiusAccServConfigReset
          WRITE-SYNTAX  INTEGER { reset(2) }

          DESCRIPTION  "The only SETable value is 'reset' (2)."

          OBJECT radiusAccClientInetAddressType
           SYNTAX InetAddressType { ipv4(1), ipv6(2) }
           DESCRIPTION
                 "An implementation is only required to support
                  IPv4 and globally unique IPv6 addresses."

           OBJECT radiusAccClientInetAddress
           SYNTAX InetAddress ( SIZE (4|16) )
           DESCRIPTION
                 "An implementation is only required to support
                  IPv4 and globally unique IPv6 addresses."

          ::= { radiusAccServMIBCompliances 2 }

   -- units of conformance

   radiusAccServMIBGroup OBJECT-GROUP
         OBJECTS {radiusAccServIdent,
                  radiusAccServUpTime,
                  radiusAccServResetTime,
                  radiusAccServConfigReset,
                  radiusAccServTotalRequests,
                  radiusAccServTotalInvalidRequests,
                  radiusAccServTotalDupRequests,
                  radiusAccServTotalResponses,
                  radiusAccServTotalMalformedRequests,
                  radiusAccServTotalBadAuthenticators,
                  radiusAccServTotalPacketsDropped,
                  radiusAccServTotalNoRecords,
                  radiusAccServTotalUnknownTypes,
                  radiusAccClientAddress,
                  radiusAccClientID,
                  radiusAccServPacketsDropped,
                  radiusAccServRequests,
                  radiusAccServDupRequests,
                  radiusAccServResponses,
                  radiusAccServBadAuthenticators,
                  radiusAccServMalformedRequests,
                  radiusAccServNoRecords,
                  radiusAccServUnknownTypes
                 }
         STATUS  deprecated
         DESCRIPTION
               "The collection of objects providing management of
                a RADIUS Accounting Server."

         ::= { radiusAccServMIBGroups 1 }

   radiusAccServExtMIBGroup OBJECT-GROUP
         OBJECTS {radiusAccServIdent,
                  radiusAccServUpTime,
                  radiusAccServResetTime,
                  radiusAccServConfigReset,
                  radiusAccServTotalRequests,
                  radiusAccServTotalInvalidRequests,
                  radiusAccServTotalDupRequests,
                  radiusAccServTotalResponses,
                  radiusAccServTotalMalformedRequests,
                  radiusAccServTotalBadAuthenticators,
                  radiusAccServTotalPacketsDropped,
                  radiusAccServTotalNoRecords,
                  radiusAccServTotalUnknownTypes,
                  radiusAccClientInetAddressType,
                  radiusAccClientInetAddress,
                  radiusAccClientExtID,
                  radiusAccServExtPacketsDropped,
                  radiusAccServExtRequests,
                  radiusAccServExtDupRequests,
                  radiusAccServExtResponses,
                  radiusAccServExtBadAuthenticators,
                  radiusAccServExtMalformedRequests,
                  radiusAccServExtNoRecords,
                  radiusAccServExtUnknownTypes,
                  radiusAccServerCounterDiscontinuity
                 }
         STATUS  current
         DESCRIPTION
               "The collection of objects providing management of
                a RADIUS Accounting Server."
         ::= { radiusAccServMIBGroups 2 }

   END

8.  Security Considerations

   There are management objects (radiusAccServConfigReset) defined in
   this MIB that have a MAX-ACCESS clause of read-write and/or read-
   create.  Such objects may be considered sensitive or vulnerable in
   some network environments.  The support for SET operations in a non-
   secure environment without proper protection can have a negative
   effect on network operations.  These are:

   radiusAccServConfigReset
      This object can be used to reinitialize the persistent state of
      any server.  When set to reset(2), any persistent server state
      (such as a process) is reinitialized as if the server had just
      been started.  Depending on the server implementation details,
      this action may or may not interrupt the processing of pending
      request in the server.  Abuse of this object may lead to a Denial
      of Service attack on the server.

   There are a number of managed objects in this MIB that may contain
   sensitive information.  These are:

   radiusAccClientIPAddress
      This can be used to determine the address of the RADIUS accounting
      client with which the server is communicating.  This information
      could be useful in mounting an attack on the accounting client.

   radiusAccClientInetAddress
      This can be used to determine the address of the RADIUS accounting
      client with which the server is communicating.  This information
      could be useful in mounting an attack on the accounting client.

   It is thus important to control even GET access to these objects and
   possibly to even encrypt the values of these object when sending them
   over the network via SNMP.  Not all versions of SNMP provide features
   for such a secure environment.

   SNMP versions prior to SNMPv3 do not provide a secure environment.
   Even if the network itself is secure (for example by using IPsec),
   there is no control as to who on the secure network is allowed to
   access and GET/SET (read/change/create/delete) the objects in this
   MIB.

   It is RECOMMENDED that implementers consider the security features as
   provided by the SNMPv3 framework (see [<A HREF="/rfcs/rfc3410.html">RFC3410</A>], section 8),
   including full support for the SNMPv3 cryptographic mechanisms (for
   authentication and privacy).

   Further, deployment of SNMP versions prior to SNMPv3 is NOT
   RECOMMENDED.  Instead, it is RECOMMENDED to deploy SNMPv3 and to
   enable cryptographic security.  It is then a customer/operator
   responsibility to ensure that the SNMP entity giving access to an
   instance of this MIB module is properly configured to give access to
   the objects only to those principals (users) that have legitimate
   rights to indeed GET or SET (change/create/delete) them.

9.  References

9.1.  Normative References

   [<A HREF="/rfcs/rfc2119.html">RFC2119</A>]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, <A HREF="/rfcs/rfc2119.html">RFC 2119</A>, March 1997.

   [<A HREF="/rfcs/rfc2578.html">RFC2578</A>]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Structure of Management Information
              Version 2 (SMIv2)", STD 58, <A HREF="/rfcs/rfc2578.html">RFC 2578</A>, April 1999.

   [<A HREF="/rfcs/rfc2579.html">RFC2579</A>]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Textual Conventions for SMIv2",
              STD 58, <A HREF="/rfcs/rfc2579.html">RFC 2579</A>, April 1999.

   [<A HREF="/rfcs/rfc2580.html">RFC2580</A>]  McCloghrie, K., Perkins, D., and J. Schoenwaelder,
              "Conformance Statements for SMIv2", STD 58, <A HREF="/rfcs/rfc2580.html">RFC 2580</A>,
              April 1999.

   [<A HREF="/rfcs/rfc2866.html">RFC2866</A>]  Rigney, C., "RADIUS Accounting", <A HREF="/rfcs/rfc2866.html">RFC 2866</A>, June 2000.

   [<A HREF="/rfcs/rfc3411.html">RFC3411</A>]  Harrington, D., Presuhn, R., and B. Wijnen, "An
              Architecture for Describing Simple Network Management
              Protocol (SNMP) Management Frameworks", STD 62, <A HREF="/rfcs/rfc3411.html">RFC 3411</A>,
              December 2002.

   [<A HREF="/rfcs/rfc4001.html">RFC4001</A>]  Daniele, M., Haberman, B., Routhier, S., and J.
              Schoenwaelder, "Textual Conventions for Internet Network
              Addresses", <A HREF="/rfcs/rfc4001.html">RFC 4001</A>, February 2005.

9.2.  Informative References

   [<A HREF="/rfcs/rfc2621.html">RFC2621</A>]  Zorn, G. and B. Aboba, "RADIUS Accounting Server MIB",
              <A HREF="/rfcs/rfc2621.html">RFC 2621</A>, June 1999.

   [<A HREF="/rfcs/rfc2865.html">RFC2865</A>]  Rigney, C., Willens, S., Rubens, A., and W. Simpson,
              "Remote Authentication Dial In User Service (RADIUS)",
              <A HREF="/rfcs/rfc2865.html">RFC 2865</A>, June 2000.

   [<A HREF="/rfcs/rfc3410.html">RFC3410</A>]  Case, J., Mundy, R., Partain, D., and B. Stewart,
              "Introduction and Applicability Statements for Internet-
              Standard Management Framework", <A HREF="/rfcs/rfc3410.html">RFC 3410</A>, December 2002.

   [<A HREF="/rfcs/rfc4670.html">RFC4670</A>]  Nelson, D., "RADIUS Accounting Client MIB for IPv6", RFC
              4670, August 2006.

Appendix A.  Acknowledgements

   The authors of the original MIB are Bernard Aboba and Glen Zorn.

   Many thanks to all reviewers, especially to Dave Harrington, Dan
   Romascanu, C.M. Heard, Bruno Pape, Greg Weber, and Bert Wijnen.

Author's Address

   David B. Nelson
   Enterasys Networks
   50 Minuteman Road
   Andover, MA  01810
   USA

   EMail: <A HREF="mailto:dnelson@enterasys.com">dnelson@enterasys.com</A>

Full Copyright Statement

   Copyright (C) The Internet Society (2006).

   This document is subject to the rights, licenses and restrictions
   contained in BCP 78, and except as set forth therein, the authors
   retain all their rights.

   This document and the information contained herein are provided on an
   "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
   OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
   ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
   INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
   INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
   WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Intellectual Property

   The IETF takes no position regarding the validity or scope of any
   Intellectual Property Rights or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; nor does it represent that it has
   made any independent effort to identify any such rights.  Information
   on the procedures with respect to rights in RFC documents can be
   found in BCP 78 and BCP 79.

   Copies of IPR disclosures made to the IETF Secretariat and any
   assurances of licenses to be made available, or the result of an
   attempt made to obtain a general license or permission for the use of
   such proprietary rights by implementers or users of this
   specification can be obtained from the IETF on-line IPR repository at
   <A HREF="http://www.ietf.org/ipr">http://www.ietf.org/ipr</A>.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights that may cover technology that may be required to implement
   this standard.  Please address the information to the IETF at
   <A HREF="mailto:ietf-ipr@ietf.org">ietf-ipr@ietf.org</A>.

Acknowledgement

   Funding for the RFC Editor function is provided by the IETF
   Administrative Support Activity (IASA).

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